Former NFL defensive end Chris Smith died Monday at the age of 31, his high school said in a tweet posted Monday night. Smith's agent, Drew Rosenhaus, confirmed the news in a tweet.

The cause of his death is not known.

Smith played eight seasons in the NFL after the Jacksonville Jaguars selected him in the fifth round of the 2014 Draft out of Arkansas. He played three years in Jacksonville before the Jaguars traded him to the Bengals in 2017.

The Jaguars, the Browns and some of Smith's former teammates, posted heartfelt messages on social media when they heard the news, including ex-Raiders quarterback Derek Carr, Browns tight end David Njoku and Buffalo Bills defensive end Shaq Lawson (who played with Smith in Houston).